qrsu.io

On 2026‑08‑04 the domain qrsu.io was observed flagged as part of an elevated‑risk generic phishing campaign. VirusTotal reports indicate that 16 of 91 scanning engines returned a malicious classification for the host, demonstrating a moderate consensus of detection across multiple vendors. The domain is listed on a single public security blocklist and is actively blocked by the PhishDestroy filtering service, confirming that at least one commercial anti‑phishing solution has incorporated it into its deny list.

No additional intelligence such as registrar details, registration date, hosting IP, autonomous system, SSL certificate information, or page title has been published in the current feed, so the underlying infrastructure remains opaque. The absence of these data points limits the ability to attribute the infrastructure to a specific operator or to map its network relationships. Nonetheless, the presence on VirusTotal and a known blocklist, combined with the elevated risk rating, suggests that qrsu.io is being used to harvest credentials or otherwise deceive users.

Defenders should add qrsu.io to local deny lists, enforce URL filtering rules that block the domain, and monitor outbound DNS queries for any attempts to resolve it. Network traffic to the domain should be logged and, where possible, redirected to a sandbox for deeper analysis. Continuous re‑evaluation is advised, as additional indicators such as hosting IPs, certificate fingerprints, or page content may emerge in future threat‑intel updates.